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-rw-r--r--org-roam-ui.el149
1 files changed, 107 insertions, 42 deletions
diff --git a/org-roam-ui.el b/org-roam-ui.el
index 473f479..80991ad 100644
--- a/org-roam-ui.el
+++ b/org-roam-ui.el
@@ -1,65 +1,130 @@
+ ;;; org-roam-ui.el --- User Interface for Org-roam -*- coding: utf-8; lexical-binding: t; -*-
+
+;; Copyright © 2021 ...
+
+;; Author: ...
+;; URL: https://github.com/org-roam/org-roam-ui
+;; Keywords: org-mode, roam
+;; Version: ...
+;; Package-Requires: ((emacs "26.1") (f "0.17.2") (org-roam "2.0.0"))
+
+;; This file is NOT part of GNU Emacs.
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+;;
+;; Org-roam-ui provides a web interface for navigating around notes created
+;; within Org-roam.
+;;
+;;; Code:
+;;;; Dependencies
(require 'f)
(require 'json)
(require 'simple-httpd)
+(require 'org-roam)
+
+(defgroup org-roam-ui nil
+ "UI in Org-roam."
+ :group 'org-roam
+ :prefix "org-roam-ui-"
+ :link '(url-link :tag "Github" "https://github.com/org-roam/org-roam-ui"))
+
+(defvar org-roam-ui/root-dir default-directory
+ "Root directory of the org-roam-ui project.")
+
+(defvar org-roam-ui/app-build-dir (expand-file-name "./web-build/")
+ "Directory containing org-roam-ui's web build.")
-(defvar org-roam-ui/root-dir
- (concat
- (file-name-directory
- (f-full (or
- load-file-name
- buffer-file-name))) "."))
+;;; Dynamic variables
+(defvar org-roam-ui-current-node-id nil
+ "The current node id Org-roam is tracking.")
-(setq org-roam-ui/app-build-dir (expand-file-name "./web-build/" org-roam-ui/root-dir))
+;; TODO: make into defcustom
+(defvar org-roam-ui-port
+ 35901
+ "Port to serve the org-roam-ui interface.")
(define-minor-mode
org-roam-ui-mode
- "Start the http API for org-roam-ui."
- :lighter ""
+ "Enable org-roam-ui.
+This serves the web-build and API over HTTP."
+ :lighter "org-roam-ui "
:global t
:group 'org-roam-ui
:init-value nil
(cond
(org-roam-ui-mode
- (setq-local httpd-port 35901)
- (setq httpd-root org-roam-ui/app-build-dir)
- (httpd-start))
+ (setq httpd-port org-roam-ui-port
+ httpd-root org-roam-ui/app-build-dir)
+ (httpd-start)
+ (add-hook 'post-command-hook #'org-roam-ui-update))
(t
+ (remove-hook 'post-command-hook #'org-roam-ui-update)
(httpd-stop))))
-
(defservlet* graph application/json ()
- (let* (
- (nodes-db-rows (org-roam-db-query `[:select [*] :from nodes]))
- (links-db-rows (org-roam-db-query `[:select [*] :from links :where (= type "id")]))
- (response (json-encode (list
- (cons 'nodes (mapcar 'nodes-row-to-cons nodes-db-rows))
- (cons 'links (mapcar 'links-row-to-cons links-db-rows))))))
- (progn
- (insert response)
- (httpd-send-header t "application/json" 200 :Access-Control-Allow-Origin "*"))))
+ (let* ((nodes-columns [id file title])
+ (links-columns [source dest])
+ (nodes-db-rows (org-roam-db-query `[:select ,nodes-columns :from nodes]))
+ (links-db-rows (org-roam-db-query `[:select ,links-columns :from links :where (= type "id")]))
+ (response (json-encode `((nodes . ,(mapcar (apply-partially #'org-roam-ui-sql-to-alist (append nodes-columns nil)) nodes-db-rows))
+ (links . ,(mapcar (apply-partially #'org-roam-ui-sql-to-alist '(source target)) links-db-rows))))))
+ (insert response)
+ (httpd-send-header t "application/json" 200 :Access-Control-Allow-Origin "*")))
-(defun nodes-row-to-cons (row)
- (list
- (cons 'id (elt row 0))
- (cons 'file (elt row 1))
- (cons 'title (elt row 8))))
-
-(defun links-row-to-cons (row)
- (list
- (cons 'source (elt row 1))
- (cons 'target (elt row 2))))
+(defun org-roam-ui-sql-to-alist (column-names rows)
+ "Convert sql result to alist for json encoding.
+ROWS is the sql result, while COLUMN-NAMES is the columns to use."
+ (let (res)
+ (while rows
+ (push (cons (pop column-names) (pop rows)) res))
+ res))
(defservlet* theme application/json ()
- (if
- (boundp 'doom-themes--colors)
+ (when (boundp 'doom-themes--colors)
(let*
- ((colors (butlast doom-themes--colors (- (length doom-themes--colors) 25)))
- (ui-theme))
- (progn
- (dolist (color colors)
- (push (cons (car color) (car (cdr color))) ui-theme))
- (insert (json-encode ui-theme))))
- (insert "{}"))
- (httpd-send-header t "text/plain" 200 :Access-Control-Allow-Origin "*"))
+ ((colors (butlast doom-themes--colors (- (length doom-themes--colors) 25)))
+ ui-theme (list nil))
+ (progn
+ (dolist (color colors)
+ (push (cons (car color) (car (cdr color))) ui-theme))
+ (insert (json-encode ui-theme))
+ (httpd-send-header t "text/plain" 200 :Access-Control-Allow-Origin "*")))))
+
+(defservlet* id/:id text/html ()
+ (let ((node (org-roam-populate (org-roam-node-create :id id)))
+ html-string)
+ (org-roam-with-temp-buffer (org-roam-node-file node)
+ (setq-local org-export-with-toc nil)
+ (setq-local org-export-with-broken-links t)
+ (setq-local org-export-with-sub-superscripts nil)
+ (setq html-string (org-export-as 'html)))
+ (insert html-string)))
+
+(defservlet* current-node-data text/event-stream ()
+ (insert (format "data: %s\n\n"
+ org-roam-ui-current-node-id)))
+
+(defun org-roam-ui-update ()
+ "Track changes within Emacs to update Org-roam UI.
+This function is added to `post-command-hook'."
+ (setq org-roam-ui-current-node-id
+ (or (org-roam-id-at-point)
+ org-roam-ui-current-node-id)))
(provide 'org-roam-ui)
+;;; org-roam-ui.el ends here